Radial J48 Active DI for acoustic guitar & bass, extra headroom & high-pass filter
Vendor: Radial
Available

Radial J48 Active DI for acoustic guitar & bass, extra headroom & high-pass filter
Phantom Powered Active Direct Box
The Radial J48 is a high performance active direct box designed for use in professional recording studio and live concert touring applications, capable of handling the extreme transients with no distortion and deliver the natural sound of the instrument at the same time.
The Radial J48 has acquired a extremely good following through the professional audio community. It comes with a sufficiently great headroom, unmatched durability and lower distortion, that makes the Radial J48 to become the most specified direct box on stages around the world and no doubt about that. The Radial J48, based on the specifications, is designed as exceptionally linear when tested both when placed under the extra stress of 100 meters (300 feet) of cable and under laboratory conditions. In the laboratory, the high frequency response is able to exceed 40kHz! This makes the Radial J48 a perfect candidate for the most demanding studio recording and being the obvious choice for the artist on stage at the same time.
Higher Rail Voltage, Higher Headroom
Most battery-powered guitars and basses will produce as much as 7 Volts when played at maximum volume, which can easily overload typical active direct boxes which have are only able to handle about 3 Volts. The J48 uses a unique switching power supply that raises the internal rail voltage so it can handle up to an incredible 9 Volts, resulting in improved signal handling and greater headroom. This additional headroom significantly reduces distortion of all types, allowing the natural tone and character of the instrument to shine through.
Features
- Exceptional headroom & dynamic range
- Retains the natural sound of the instrument
- Merge switch sums stereo instruments to mono
- Powered by 48V phantom, no batteries required
Specifications | ||
---|---|---|
Audio circuit type: | Proprietary analog circuit with low-noise op-amp | |
Frequency response: | 20Hz ~ 20kHz | |
Dynamic range: | 109dB | |
Total harmonic distortion: | 0.002% @ -5dBu | |
Intermodulation Distortion: | 0.003% @ -3dBu | |
Phase Deviation: | +10º at 20Hz | 0º at 1kHz | -1º at 20kHz | |
Input Impedance: | 220kΩ - ¼" input | |
Output Impedance: | 200Ω - XLR output | |
Equivalent Input Noise: | -103dBu | |
Noise: | -99dB below 0dBu | |
Maximum Input: | +10dBu | |
Features | ||
Input pad, Mono Sum, 180° polarity reverse, Ground lift, HPF | ||
Input Connectors: | 1/4" | |
Output Connectors: | Balanced XLR, 1/4" Thru | |
General | ||
Construction: | 14 gauge steel chassis and outer shell | |
Size (L x W x D): | 3.3" x 5.0" x 2" (84 x 127 x 48mm) | |
Weight: | 1.55 lb (720 g) | |
Power: | 48V phantom - proprietary digital switching | |
Conditions: | For use in dry locations only between 5°C and 40°C | |
Warranty: | Radial 3-year, transferable |